Since 1990, California public waterutilities have been providing anannual Water Quality Report to theircustomers. This year’s report coverscalendar year 2019 drinking waterquality testing and reporting. YourCity of San Juan Capistrano Utilities

Department (City) vigilantly safeguards its water supply and,as in years past, the water delivered to your home meets thequality standards required by federal and state regulatoryagencies. The U.S. Environmental Protection Agency (USEPA)and the State Water Resources Control Board, Division ofDrinking Water (DDW) arethe agencies responsible forestablish ing and enforcingdrinking water qualitystandards.

In some cases, the Citygoes beyond what is requiredby testing for unregulated chemicals that may have knownhealth risks but do not have drinking water standards. Forexample, the City, which produces and treats localgroundwater, and the Metropolitan Water District of SouthernCalifornia (MWDSC), which supplies treated importedsurface water to the City, test for unregulated chemicals inour water supply. Unregulated chemical monitoring helpsUSEPA and DDW determine where certain chemicals occurand whether new standards need to be established for thosechemicals to protect public health.

Through drinking water quality testing programs carried outby the City for local groundwater, treated ground water and in

its drinking water distri bution system,and MWDSC for treated surfacewater, your drinking water isconstantly monitored from source totap for regulated and unregu latedconstituents.

The State allows us to monitor forsome contaminants less than once peryear because the concentrations of

these contaminants do not change frequently. Some of ourdata, though representative, are more than one year old.

Your 2020Water

QualityReport

Your 2020Water

QualityReport

Sources of SupplyThe City receives its water from threesources. Water is purchased fromMWDSC. MWDSC ’s imported watersources are a blend of State WaterProject water from northern California,and water from the Colorado RiverAqueduct. Further more, the City issupplied with treated water from theGround Water Recovery Plant and onepotable production well located in theNorthern portion of the City.

Basic Information About Drinking Water ContaminantsThe sources of drinking water (both tap water and bottled water)include rivers, lakes, streams, ponds, reservoirs, springs and wells.As water travels over the surface of land or through the layers of theground it dissolves naturally occurring minerals and, in some cases,radioactive material, and can pick up substances resulting from thepresence of animal and human activity.

Contaminants that may be present in source water include:S Microbial contaminants, such as viruses and bacteria, which may

come from sewage treatment plants, septic systems, agriculturallivestock operations and wildlife.

S Inorganic contaminants, suchas salts and metals, which canbe natur ally occurring or resultfrom urban storm runoff,industrial or domesticwastewater discharges, oil andgas production, mining andfarming.

S Radioactive contaminants,which can be naturallyoccurring or be the result of oiland gas production or miningactivities.

S Organic chemical contaminants, including synthetic and volatileorganic chemicals, which are by-products of industrial processesand petroleum production, and can also come from gasolinestations, urban stormwater runoff, agricultural application andseptic systems.

S Pesticides and herbicides, which may come from a variety of sourcessuch as agriculture, urban storm water runoff and residential uses.In order to ensure that tap water is safe to drink, USEPA and the

DDW prescribe regulations that limit the amount of certaincontaminants in water provided by public water systems.

The U.S. Food and Drug Administration regulations andCalifornia law also establish limits for contaminants in bottled waterthat must provide the same protection for public health. Drinkingwater, including bottled water, may reasonably be expected tocontain at least small amounts of some contaminants. The presenceof contaminants does not necessarily indicate that water poses ahealth risk.

More information about contaminants and potential healtheffects can be obtained by calling the USEPA’s Safe Drinking WaterHotline at (800) 426-4791.

CryptosporidiumCryptosporidium is a microscopic organism that, when ingested,

can cause diarrhea, fever, and other gastro intestinal symptoms. Theorganism comes from animal and/or human wastes and may be insurface water. MWDSC tested their source water and treatedsurface water for Cryptosporidium in 2019 but did not detect it. If itever is detected, Cryptosporidium is eliminated by an effective treat -ment combination including sedimentation, filtration and disinfection.

The USEPA and the federal Centers for Disease Controlguidelines on appro priate means to lessen the risk of infection byCryptosporidium and other microbial contaminants are available fromUSEPA’s Safe Drinking Water Hotline at (800) 426-4791, or on theweb at www.epa.gov/safewater.

Drinking Water FluoridationFluoride has been added to

U.S. drinking water suppliessince 1945. Of the 50 largestcities in the U.S., 43 fluori datetheir drinking water.

In December 2007, theMWDSC joined a majority ofthe nation’s public watersuppliers in adding fluoride todrinking water in order toprevent tooth decay. MWDSC was in compliance with all provisionsof the State's fluoridation system requirements.

Our local water is not supple mented with fluoride.

Fluoride levels in drinking water are limited under California stateregulations at a maximum dosage of 2 parts per million.

There are many places to go for additional infor mation about thefluoridation of drinking water.

U.S. Centers for Disease Control and Prevention:www.cdc.gov/fluoridation/

State Water Resources Control Board, Division of Drinking Water

www.waterboards.ca.gov/drinking_water/certlic/drinkingwater/Fluoridation.html

For more information about MWDSC’s fluori da tion program,please contact Edgar G. Dymally at (213) 217-5709 or atedymally@mwdh2o.com.

Immuno-Compromised PeopleSome people may be more vulnerable to

contaminants in drinking water than thegeneral population. Immuno-compromisedpeople, such as those with cancer who areunder going chemo therapy, persons whohave had organ trans plants, people withHIV/AIDS or other immune system disorders,some elderly persons and infants can beparticularly at risk to infection. These peopleshould seek advice about drinking waterfrom their health care providers.

For information about this report, or your water quality informa tion ingeneral, please contact the City of San Juan Capistrano, UtilitiesDepartment at (949) 234-4400.

The City of San Juan Capistrano Utilities Commission meets the thirdTuesday of every month at 8:00 am and is open to the public. The CityCouncil meets the first and third Tuesday of every month at 5:00 pm and isopen to the public. Meetings are held in the City of San Juan CapistranoCouncil Chambers located at 32400 Paseo Adelanto, San Juan Capistrano.Please feel free to participate in these meetings.

For more information about health effects of the listed con tami nants inthe following tables, call the USEPA hotline at (800) 426-4791.

Questions about your water?Contact us for answers.

The Quality of Your Water Is Our Primary ConcernThe Quality of Your Water Is Our Primary Concern

What are Water Quality Standards?Drinking water standards established by USEPA and DDWset limits for substances that may affect consumer healthor aesthetic qualities of drinking water. The chart in thisreport shows the following types of water quality standards:• Maximum Contaminant Level (MCL): The highest level of a

contaminant that is allowed in drinking water. PrimaryMCLs are set as close to the PHGs (or MCLGs) as iseconomically and technologically feasible.

• Maximum Residual Disinfectant Level (MRDL): The highestlevel of a disinfectant allowed in drinking water. There isconvincing evidence that addition of a disinfectant isnecessary for control of microbial contaminants.

• Secondary MCLs: Set to protect the odor, taste, andappearance of drinking water.

• Primary Drinking Water Standard: MCLs for conta mi nantsthat affect health along with their monitoring and reportingrequirements and water treatment requirements.

• Regulatory Action Level (AL): The concentration of acontaminant, which, if exceeded, triggers treatment orother requirements that a water system must follow.

How are Contaminants Measured?Water is sampled and tested throughout the year.Contaminants are measured in:

• parts per million (ppm) or milligrams per liter (mg/L)• parts per billion (ppb) or micrograms per liter (µg/L)• parts per trillion (ppt) or nanograms per liter (ng/L)

What is a Water Quality Goal?In addition to mandatory water quality standards, USEPAand DDW have set voluntary water quality goals for somecon tami nants. Water quality goals are often set at such lowlevels that they are not achievable in practice and are notdirectly measurable. Nevertheless, these goals provideuseful guide posts and direction for water managementpractices. The chart in this report includes three types ofwater quality goals:• Maximum Contaminant Level Goal (MCLG): The level of a

contaminant in drinking water below which there is no knownor expected risk to health. MCLGs are set by USEPA.

• Maximum Residual Disinfectant Level Goal (MRDLG): Thelevel of a drinking water disinfectant below which there isno known or expected risk to health. MRDLGs do notreflect the benefits of the use of disinfectants to controlmicrobial contaminants.

• Public Health Goal (PHG): The level of a contaminant indrinking water below which there is no known or expectedrisk to health. PHGs are set by the California Environ mentalProtection Agency.

Disinfectants and Disinfection ByproductsDisinfection of drinking water was one of the major publichealth advances in the 20th century. Disinfec tion was amajor factor in reducing water borne disease epidemicscaused by pathogenic bacteria and viruses, and it remainsan essential part of drinking water treatment today.

Chlorine disinfection has almost completelyeliminated from our lives the risks of microbialwater borne diseases. Chlorine is added to yourdrinking water at the source of supply (ground -water well or surface water treatment plant).Enough chlorine is added so that it does notcompletely dissipate through the distributionsystem pipes. This “residual” chlorine helps toprevent the growth of bacteria in the pipes thatcarry drinking water from the source into your home.

However, chlorine can react with naturally-occurringmaterials in the water to form unintend ed chemicalbyproducts, called disinfection byproducts (DBPs), whichmay pose health risks. A major challenge is how tobalance the risks from microbial pathogens and DBPs. It isimportant to provide protection from these microbialpathogens while simul taneously ensuring decreasinghealth risks from disinfection byproducts. The Safe

Drinking Water Act requires the USEPA to develop rulesto achieve these goals.

Trihalomethanes (THMs) and Haloacetic Acids (HAAs)are the most common and most studied DBPs found indrinking water treated with chlorine. In 1979, the USEPAset the maximum amount of total THMs allowed in drink -ing water at 100 parts per billion as an annual running aver -

age. Effective in January2002, the Stage 1Disinfectants / DisinfectionByproducts Rule loweredthe total THM maximumannual average level to 80parts per billion and addedHAAs to the list ofregulated chemicals in

drinking water. Your drinking water complies with theStage 1 Disinfectants / Disinfection Byproducts Rule.

Stage 2 of the regulation was finalized by USEPA in2006, which further controls allowable levels of DBPs indrinking water without compromising disinfection itself.A required distribution system evaluation was completedin 2008 and a Stage 2 monitoring plan has been approvedby DDW. Full Stage 2 compliance began in 2012.

Total Coliform RuleThis Consumer Confidence Report (CCR) reflects

changes in drinking water regula tory requirementsinstituted during 2016. All water systems are required tocomply with the state Total Coliform Rule. EffectiveApril 1, 2016, all water systems are also required tocomply with the federalRevised Total Coliform Rule.

The new federal ruleprotects public health byensuring the integrity of thedrinking water distri butionsystem by monitoring forthe presence of microbials(i.e., total coliform and E. coli

bacteria).The USEPA anticipates

greater public health protection as the new rule requireswater systems that are vulnerable to microbialcontamination to identify and resolve potential issues.

Water systems that exceed a specified frequency oftotal coliform occurrences are required to conduct anassessment to determine if any sanitary defects exist.If found, these must be corrected by the water system.

2019 Metropolitan Water District of Southern California Treated Surface Water Average Range of MCL Typical SourceChemical MCL PHG Amount Detections Violation? of Chemical

Inorganic Chemicals – Tested in 2019

Aluminum (ppm) 1 0.6 0.124 ND – 0.065 No Treatment Process Residue, Natural DepositsBromate (ppb) 10 0.1 2 ND – 5.9 No Byproduct of Drinking Water OzonationFluoride (ppm) 2 1 0.7 0.1 – 0.9 No Water Additive for Dental HealthNitrate as N (ppm) 10 10 0.5 0.5 No Fertilizers, Septic Tanks, Natural Deposits

Secondary Standards* – Tested in 2019

Aluminum (ppb) 200* 600 124 ND – 65 No Treatment Process Residue, Natural DepositsChloride (ppm) 500* n/a 56 53 – 58 No Runoff or Leaching from Natural DepositsColor (color units) 15* n/a ND ND – 1 No Naturally-occurring Organic MaterialsOdor (threshold odor number) 3* n/a ND ND – 1 No Naturally-occurring Organic MaterialsSpecific Conductance (µmho/cm) 1,600* n/a 514 508 – 521 No Substances that Form Ions in WaterSulfate (ppm) 500* n/a 91 89 – 93 No Runoff or Leaching from Natural DepositsTotal Dissolved Solids (ppm) 1,000* n/a 304 296 – 312 No Runoff or Leaching from Natural Deposits

Unregulated Chemicals – Tested in 2019

Alkalinity, total as CaCO3 (ppm) Not Regulated n/a 72 69 – 74 n/a Runoff or Leaching from Natural DepositsBoron (ppm) NL=1 n/a 0.12 0.12 n/a Runoff or Leaching from Natural DepositsCalcium (ppm) Not Regulated n/a 30 29 – 30 n/a Runoff or Leaching from Natural DepositsHardness, total as CaCO3 (ppm) Not Regulated n/a 127 124 – 130 n/a Runoff or Leaching from Natural DepositsHardness, total (grains/gallon) Not Regulated n/a 7.4 7.3 – 7.6 n/a Runoff or Leaching from Natural DepositsMagnesium (ppm) Not Regulated n/a 14 13 – 14 n/a Runoff or Leaching from Natural DepositsPerfluorohexanoic Acid (ppt) Not Regulated n/a 2.3 2.2 – 2.3 n/a Industrial DischargepH (pH units) Not Regulated n/a 8.4 8.4 – 8.5 n/a Hydrogen Ion ConcentrationPotassium (ppm) Not Regulated n/a 2.8 2.6 – 2.9 n/a Runoff or Leaching from Natural DepositsSodium (ppm) Not Regulated n/a 56 54 – 57 n/a Runoff or Leaching from Natural DepositsTotal Organic Carbon (ppm) TT n/a 2.4 1.8 – 2.6 n/a Various Natural and Man-made Sourcesppb = parts per billion; ppm = parts per million; ppt = parts per trillion; µmho/cm = micromhos per centimeter; ND = not detected;MCL = Maximum Contaminant Level; PHG = California Public Health Goal; NL = Notification Level; n/a = not applicable; TT = treatment technique

*Chemical is regulated by a secondary standard.

Turbidity – combined filter effluent Treatment Turbidity TT Metropolitan Water District Diemer Filtration Plant Technique Measurements Violation? Typical Source of Chemical

1) Highest single turbidity measurement 0.3 NTU 0.05 No Soil Runoff2) Percentage of samples less than 0.3 NTU 95% 100% No Soil RunoffTurbidity is a measure of the cloudiness of the water, an indication of particulate matter, some of which might include harmful microorganisms. NTU = nephelometric turbidity unitsLow turbidity in Metropolitan’s treated water is a good indicator of effective filtration. Filtration is called a ”treatment technique“ (TT). A treatment technique is a required process intended to reduce the level of chemicals in drinking water that are difficult and sometimes impossible to measure directly.

Unregulated Chemicals Requiring Monitoring

Notification Average Range of Most RecentChemical Level PHG Amount Detections Sampling Date

Manganese (ppb)** SMCL = 50 n/a 1.7 0.43 – 4.1 2019SMCL = Secondary MCL

**Manganese is regulated with a secondary standard of 50 ppb but was not detected, based on the detection limit for purposes of reporting of 20 ppb. Manganese was included as part of the unregulated chemicals requiring monitoring.

Important Information the EPAWould Like You to Know

Source Water AssessmentsImported (MWDSC) Water AssessmentEvery five years, MWDSC is required by DDW toexamine possible sources of drinking water contami -nation in its State Water Project and Colorado Riversource waters.

The most recent watershed sanitary surveys of itssource water supplies from the Colorado River wasupdated in 2015 and the State Water Project wasupdated in 2016.

Water from the Colorado River is considered to bemost vulnerable to contamination from recreation,urban/stormwater runoff, increasing urbanization inthe watershed, and wastewater. Water supplies fromNorthern California’s State Water Project are mostvulnerable to contamination from urban/stormwaterrunoff, wildlife, agriculture, recreation, andwastewater.

USEPA also requires MWDSC to complete oneSource Water Assessment (SWA) that utilizesinformation collected in the water shed sanitarysurveys. MWDSC completed its SWA in December2002. The SWA is used to evalu ate the vulnerabilityof water sources to con tamination and helps deter -mine whether more protective measures are needed.

A copy of the most recent summary of eitherWatershed Sanitary Survey or the SWA can beobtained by calling MWDSC at (800) CALL-MWD(225-5693).

Groundwater AssessmentA copy of the assessment of the drinking water

sources for the City completed in March 2001 isavailable at State Water Resources Control Board,Division of Drinking Water, 2 MacArthur Place, Suite150, Santa Ana, CA 92707 or the City of San JuanCapistrano – Water Division office, 32400 PaseoAdelanto, San Juan Capistrano, CA 92675.

About Lead in Tap WaterIf present, elevated levels of lead can cause

serious health problems, especially for pregnantwomen and youngchildren. Lead in drink -ing water is primarilyfrom materials andcomponents associatedwith service lines andhome plumbing.

The City is respon -sible for providing highquality drinking water,but cannot control the variety of materials usedin plumbing components within home fixtures.

When your water has been sitting for severalhours, you can minimize the potential for leadexposure by flushing your tap for 30 seconds to2 minutes before using water for drinking orcooking.

If you are concerned about lead in your water,you may wish to have your water tested.Information on lead in drinking water, testingmethods, and steps you can take to minimizeexposure is available from the Safe DrinkingWater Hotline or at: www.epa.gov/safewater/lead.

2019 City of San Juan Capistrano Groundwater Quality Average Average Most Recent PHG Amount Amount SJBA Range of MCL Sampling Typical Source Chemical MCL (MCLG) SJC Wells Treated Wells Detections Violation? Date of Contaminant

Radiologicals

Alpha Radiation (pCi/L) 15 (0) 4.4 3.7 ND – 7.5 No 2013 Erosion of Natural DepositsCombined Radium (pCi/L) 5 (0) ND <1 ND – 1.5 No 2013 Erosion of Natural DepositsUranium (pCi/L) 20 0.43 4.2 2 0.97 – 6.6 No 2017 Erosion of Natural Deposits

Organic Chemicals

Methyl-Tert-Butyl Ether (ppb) 13 13 ND ND ND No 2019 Leaking Underground Storage Tanks; Industrial Discharge

Inorganic Chemicals

Fluoride (ppm) 2 1 0.25 ND ND – 0.29 No 2019 Erosion of Natural DepositsNitrate (ppm as N) 10 10 1.77 ND ND – 2.13 No 2019 Fertilizers, Septic TanksNitrate + Nitrite (ppm as N) 10 10 1.86 ND ND – 2.21 No 2019 Fertilizers, Septic Tanks

Secondary Standards*

Chloride (ppm) 500* n/a 189 51.8 28.4 – 195 No 2019 Erosion of Natural DepositsSpecific Conductance (µmho/cm) 1,600* n/a 1,778 483 222 – 1,930 No 2019 Substances Form Ions in WaterSulfate (ppm) 500* n/a 320 75 33 – 341 No 2019 Erosion of Natural DepositsTotal Dissolved Solids (ppm) 1,000* n/a 1,125 265 110 – 1,230 No 2019 Erosion of Natural DepositsTurbidity (NTU) 5* n/a 0.64 0.24 ND – 2 No 2019 Erosion of Natural Deposits

Unregulated Chemicals

Alkalinity, total (ppm as CaCO3) Not Regulated n/a 305 80 55 – 330 n/a 2019 Erosion of Natural DepositsCalcium (ppm) Not Regulated n/a 202 25 5 – 221 n/a 2019 Erosion of Natural DepositsHardness, total (ppm as CaCO3) Not Regulated n/a 762 92 20 – 858 n/a 2019 Erosion of Natural DepositsHardness, total (grains per gallon) Not Regulated n/a 45 5.4 1.2 – 50 n/a 2019 Erosion of Natural DepositsMagnesium (ppm) Not Regulated n/a 46.2 7 1.6 – 50.8 n/a 2019 Erosion of Natural DepositspH (pH units) Not Regulated n/a 7.02 7.08 6.25 – 7.94 n/a 2019 Hydrogen Ion ConcentrationPotassium (ppm) Not Regulated n/a 3.17 0.96 ND – 3.45 n/a 2019 Erosion of Natural DepositsSodium (ppm) Not Regulated n/a 115 68.4 43.6 – 133 n/a 2019 Erosion of Natural DepositsSJC = San Juan Capistrano; SJBA = San Juan Basin Authority; ppb = parts-per-billion; ppm = parts-per-million; pCi/L = picoCuries per liter; NTU = nephelometric turbidity units;ND = not detected; n/a = not applicable; < = average is less than the detection limit for reporting purposes; µmho/cm = micromho per centimeter;MCL = Maximum Contaminant Level; (MCLG) = federal MCL Goal; PHG = California Public Health Goal*Chemical is regulated by a secondary standard to maintain aesthetic qualities (taste, odor, color).

Unregulated Chemicals Requiring Monitoring Notification Avg. Amount Avg. Amount SJBA Range of Most RecentChemical Level PHG SJC Wells Treated Wells Detections Sampling Date

Chlorate (ppb) 800 n/a 33 515 22 – 880 2015Chromium, Hexavalent (ppb) n/a 0.02 0.065 <0.03 ND – 0.067 2015Chromium, Total (ppb) ** MCL = 50 MCLG = 100 0.23 0.11 ND – 0.24 2015Molybdenum, Total (ppb) n/a n/a 4.9 1.9 1.1 – 5.1 2015Perfluorooctanoic Acid (ppb) n/a n/a <0.02 ND ND – 0.021 2015Strontium, Total (ppb) n/a n/a 1,100 310 240 – 1,100 2015Vanadium, Total (ppb) 50 n/a 1 ND ND – 1.1 2015**Total chromium is regulated with an MCL of 50 ppb but was not detected, based on the detection limit for purposes of reporting of 10 ppb.

Total chromium was included as part of the unregulated chemicals requiring monitoring.

2019 City of San Juan Capistrano Distribution System Water QualityDisinfection Byproducts MCL (MRDL/MRDLG) Average Amount Range of Detections MCL Violation? Typical Source of Contaminant

Total Trihalomethanes (ppb) 80 28 ND – 38 No Byproducts of Chlorine DisinfectionHaloacetic Acids (ppb) 60 12 ND – 21 No Byproducts of Chlorine DisinfectionChlorine Residual (ppm) (4 / 4) 1.4 0.86 – 1.48 No Disinfectant Added for Treatment

Aesthetic Quality

Turbidity (NTU) 5* 0.17 ND – 0.64 No Erosion of Natural DepositsNine locations in the distribution system are tested quarterly for total trihalomethanes and haloacetic acids; three locations are tested monthly for color, odor and turbidity. Color and odor were not detected in 2019. MRDL = Maximum Residual Disinfectant Level; MRDLG = Maximum Residual Disinfectant Level Goal*Chemical is regulated by a secondary standard to maintain aesthetic qualities (taste, odor, color).

Bacterial Quality MCL MCLG Highest Monthly Positive Samples MCL Violation? Typical Source of Contaminant

Total Coliform Bacteria 5.0% 0 3.0% No Naturally present in the environmentNo more than 5.0% of the monthly samples may be positive for total coliform bacteria. The occurrence of 2 consecutive total coliform positive samples, one of which contains fecal coliform/E.coli, constitutes an acute MCL violation.

Lead and Copper Action Levels at Residential Taps Action Level Public 90th Sites Exceeding AL / AL Typical Source (AL) Health Goal Percentile Value Number of Sites Violation? of Contaminant

Lead (ppb) 15 0.2 1 1 / 30 No Corrosion of Household PlumbingCopper (ppm) 1.3 0.3 0.27 0 / 30 No Corrosion of Household PlumbingEvery three years, selected residences are tested for lead and copper at-the-tap. The most recent set of thirty samples was collected in 2017.Lead was detected in 12 homes and copper was detected in 30 homes, none of which exceeded the lead or copper regulatory Action Level (AL).A regulatory Action Level is the concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow. In 2019, one school submitted a request to be sampled for lead.

Unregulated Chemicals Requiring Monitoring in the Distribution System

Chemical Notification Level PHG Average Amount Range of Detections Most Recent Sampling Date

Chlorate (ppb) 800 n/a 91 49 – 150 2015Chromium, Hexavalent (ppb) n/a 0.02 0.053 0.038 – 0.068 2015Chromium, Total (ppb)** MCL = 50 MCLG = 100 0.2 ND – 0.27 2015Haloacetic Acids (HAA5) (ppb) n/a n/a 4.4 1.64 – 6.8 2019Haloacetic Acids (HAA6Br) (ppb) n/a n/a 5.3 1.99 – 7.3 2019Haloacetic Acids (HAA9) (ppb) n/a n/a 8.1 3.06 – 12.3 2019Molybdenum, Total (ppb) n/a n/a 4.8 3.6 – 5.4 2015Strontium, Total (ppb) n/a n/a 1,100 690 – 1,200 2015Vanadium, Total (ppb) 50 n/a 2.4 0.85 – 2.8 2015**Total chromium is regulated with an MCL of 50 ppb but was not detected, based on the detection limit for purposes of reporting of 10 ppb.

Total chromium was included as part of the unregulated chemicals requiring monitoring.

This report contains important information about your drinking water.Translate it, or speak with someone who understands it.

Este informe contiene información muy importante sobre su agua potable.Tradúzcalo o hable con alguien que lo entienda bien.

Your Water: Always Available, Always Assured

THE DIEMER WATER TREATMENT PLANT, located in the hillsabove Yorba Linda, processes up to 520 million

gallons of clean water per day — enough to fill the RoseBowl every 4 hours. The water is a blend from both theColorado River Aqueduct and the State Water Project.At 212-acres, it’s one of the largest water treatment plantsin the U.S. It provides nearly half of Orange County’s totalwater supply.

Water flowing from Diemer meets — or exceeds — all state and federal regulations. And it iskept safe from the treatment plant to your tap by constant testing throughout the distributionnetwork. The City of San Juan Capistrano Utilities Department monitors the water quality at allsources, reservoirs, and various points on the distribution system. This constant surveillanceensures your drinking water stays within the requirements mandated by the federal Safe DrinkingWater Act.

City of San Juan CapistranoUtilities Department32450 Paseo Adelanto

San Juan Capistrano, California 92675

RECYCLEDPAPERP R I N T E D O N